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The Osprey Rev 6 pack is lightweight, yet has storage capacity for extra apparel and a 1.5L hydration reservoir to keep you hydrated for day-long efforts on the trail. Featuring a unique fit system that works in-tandem with the Osprey reservoir, this pack fits close and minimizes bounce even when fully loaded. Dual large rear pockets, side open mesh pockets and an external bungee store apparel and gear; several front pockets stash an extra bottle, nutrition, essentials and a smartphone or camera.